You jump from the window. Then land on the railing at the side.

http://img303.imageshack.us/my.php?imag ... 002xh5.jpg

That window and from there you jump/walk onto the railing.

I need some help with a jump from top hole house window, where you jump to the railing and from there can make your way to get in the top of archers building. I'm not sure what kind of jump it is and i'm struggling to do it, any help would be appreciated.

Thanks